Search Results: 'satellite navigation'


13 results for "satellite navigation"
Satellites By Karam Moore
eBook (PDF): $8.99
Satellites are used for many purposes. Common types include military and civilian Earth observation satellites, communications satellites, navigation satellites, weather satellites, and space... More > telescopes. Space stations and human spacecraft in orbit are also satellites. Satellite orbits vary greatly, depending on the purpose of the satellite, and are classified in a number of ways. Well-known (overlapping) classes include low Earth orbit, polar orbit, and geostationary orbit. A launch vehicle is a rocket that throws a satellite into orbit. Usually it lifts off from a launch pad on land. Some are launched at sea from a submarine or a mobile maritime platform, or aboard a plane (see air launch to orbit).< Less
Global Navigation Satellite Systems - From Stellar to Satellite Navigation By Ahmed H Mohamed
eBook (PDF): $9.99
Today, satellite navigation offers convenient alternative to terrestrial and stellar navigation methods that is not only ubiquitous and easy to operate but also available day and night. The radio... More > navigation technology, first appeared in the 1930s and matured in the 1940s, did not take off until the late 1960s and 1970s with the launch of the first navigation satellites by the US Naval and Air Forces, resulting from the NAVSTAR GPS program. The end user navigation equipment, bulky and expensive at the beginning, did not emerge until the microprocessor became viable during the late 1970s. Now-a-day three other global navigation satellite systems are fully or partially operational: the Russian GLONASS, the European Union Galileo, and the Chinese BeiDou. Where does the future lie? Probably in a network of global satellite navigation systems, with increase in satellite coverage and improved accuracy, integrity, and reliability,< Less
Mapping and Navigation: Explore the History and Science of Finding Your Way By Cynthia Light Brown
eBook (PDF): $8.99
Illustrated by Beth Hetland. Guided Reading Level: V How did we get from 20-foot-long maps to GPS devices small enough to fit in the palm of our hands? How does GPS work and what can it tell us? How... More > do ancient mapmaking techniques used by the Romans and Greeks influence the satellite technologies we use today? The history of mapmaking is full of remarkable characters who charted the unknown with an ever-changing set of tools. In Mapping and Navigation: The History and Science of Finding Your Way, kids ages 9–12 will learn the history and science behind the evolution of mapmaking, and how much is still out there for discovery. Readers will explore ideas through hands-on experiments while learning new terminology and interesting facts. Projects include using triangulation to measure distances, creating contour lines on a mini-mountain to understand elevation changes on a map, and inventing a sundial and compass to understand the basics of navigation.< Less
Navy Electronics Technician: Volume 5 - Navigation Systems (NAVEDTRA 14090) (Nonresident Training Course) By Naval Education & Training Center
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COURSE OVERVIEW: In completing this nonresident training course, you should be able to: Identify the primary navigation systems used by Navy surface vessels; identify the basic components of and... More > explain the basic operation of the Ship’s Inertial Navigation System (SINS); identify the basic components of and explain the operation of the U.S. Navy Navigation Satellite System (NNSS); identify the basic components of and explain the operation of the NAVSTAR Global Positioning System (GPS); and identify the basic components of and explain the operation of the Tactical Air Navigation (TACAN) system.< Less
The Brick Moon By Edward Everett Hale
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This slim novel---the only science fiction story ever written by clergyman Edward Everett Hale, who also wrote the classic "Man Without A Country"---contains the first suggestion ever made... More > for an artificial Earth satellite. Written in 1869, it also describes many of the functions modern satellites would fulfill: communications, navigation, weather observation, etc. Full of humor and gentle satire, the story is as readable today as it was nearly 140 years ago. Includes "On Vesta", a short essay by Konstantin Tsiolkovksy.< Less
Single-Frequency GNSS Ionospheric Delay Estimation By Torben Schüler
Hardcover: $49.99
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The Global Positioning System (GPS) is being used for monitoring of the ionosphere since a long time. It is a common belief that dual-frequency receivers are needed for this purpose. However,... More > single-frequency ionospheric delay estimation works as well, it does not require any inter-frequency bias calibration, and can be operated using much cheaper receiver equipment. In addition, the European Galileo satellite navigation system offers one dedicated signal which is much more precise than any of the various GPS signals: The E5 AltBOC-modulated wideband signal. This makes single-frequency monitoring of the vertical total electron content (VTEC) even more attractive. This book describes the retrieval algorithm in detail. It serves as a memorandum, but is also meant as a resource for university students at graduate level.< Less
GNSS – Globalne Navigacne Satelitne Systemy v Skratke By Jozef Kozár
eBook (ePub): $6.18
[EN] Guide to study of the global navigation satellite systems (GNSS). Contains description of main GNSS systems and its evolution. The book is in Slovak language. [SK] Sprievodca k... More > štúdiu globálnych navigačných satelitných systémov (GNSS). Kniha popisuje hlavné GNSS systémy a ich vývoj. Kniha je v slovenskom jazyku.< Less
Precise Single-Frequency Positioning Using the Galileo E5 AltBOC Signal By Torben Schüler
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The scientific community is actively and intensively making use of GNSS techniques since the very first beginning of GPS, i.e. approximately since 1985. The current paradigm in the scientific... More > community is that accurate results essentially require dual-frequency receivers with a preferred use of carrier phase measurements for precise positioning applications. This way of thinking is primarily motivated by the fact that the ionospheric delay can be eliminated by use of observations on at least two frequencies. However, the European satellite navigation system Galileo will offer one dedicated signal which is superior to all other signals: The broadband signal E5. This signal is expected to have a very low range noise in the cm range as well as the lowest multipath error impact ever observed in the history of satellite navigation which can be as low as a couple of centimeters in benign environments. This offers new possibilities for precise single-frequency positioning, which is topic of this report.< Less
GPS versus Galileo: Balancing for Position in Space By Scott W. Beidleman
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This study investigates Europe’s motives to develop the independent satellite navigation system known as Galileo despite the existence of America’s successful global positioning system... More > (GPS). The author contends that Europe’s pursuit of Galileo is driven by a combination of reasons, including performance, independence, and economic incentive. With Galileo, Europe hopes to achieve political, security, and technological independence from the United States. Additionally, Europe envisions overcoming the US monopoly on GNSS by seizing a sizable share of the expanding GNSS market and setting a new world standard for satellite navigation. Finally, the author explores Galileo’s impact on the United States and reviews US policy towards Galileo. The study concludes with recommendations to strengthen the competitiveness of GPS. (Originally published by Air University Press)< Less
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Phased Locked-Loop is an important building block of linear systems. Electronic phased locked-loop came into in 1930s when it was used for radar communications and communication applications. The... More > high cost of realizing PLL in discrete form limited its use earlier. Now with advanced IC technology PLLs available as inexpensive monolithic ICs, this technique for electronic frequency control is used today in satellite communication systems, air borne navigation systems, Computers etc< Less

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